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Finding the Fourth Proportional to 953.71, 1,315.69 and 555.35

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Solution

The fourth proportional to 953.71, 1,315.69 and 555.35 is: 766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.71 : 1,315.69 = 555.35 : x
  2. Step 2: Convert to fraction form
    953.71/1,315.69 = 555.35/x
  3. Step 3: Cross multiply
    953.71x = 1,315.69 × 555.35
  4. Step 4: Simplify right side
    953.71x = 730,660.47
  5. Step 5: Solve for x
    x = 730,660.47/953.71
  6. Step 6: Final answer
    x = 766.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.